DT 770 PRO (250 OHM) vs. ATHM50S vs. SRH840 vs. MHP-839

Which would be better for mainstream R&B, Hip-Hop, Country (top three genre's but listen to everything from time to time) and movies; Also driven by iPhone/EVO (would buy FiiO e11 if needed), using MP3 files (I'm deployed so really my only option):

DT 770 PRO (250 OHM) - $190

ATHM50S - $120

SRH840 - $180

MHP-839 - $27 (I understand it's cheap but would prob invest in better pads and upgrades the look; more around $65)

Or any other better option for general use?

Background: Have the CAL!s (overall nice and want to love it; feel it's lacking), but I want better isolation...a little more bass and prominent mids for my types of music. I really appreciate everyone's help!